Calculating-machine.



B. R. WEBSTER.

CALCULATING MACHINE. APPLIOATIOH FILED 00m. 9, 190a.

Patented Aug. 23, 1910.

3 SHEETS-SHEET 1.

B. R. WEBSTER. GALGULATI'NG momma. APPLICATION I'ILEDOGT- 9, 1908.

3 SHEETS-813E113. 2.

Patented Aug. 23, 1910.

Patented Aug. 23, 1910.

a SHEETS-SHEET a.

B. R. WEBSTER. CALCULATING MACHINE.

APPLIOATION FILED 001- 9, 1908.

ma a E? 20 master wheel an 40 columns.

UNITED STATES PATENT OFFICE.

BES'IER R. WEBSTER, OF ELGIN, ILLINOIS, ASSIGNOR TO WAHL ADDING MACHINE(30., 'OF CHICAGO, ILLINOIS.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Aug. 23, 1910.

I Application filed October 9, 1908. Serial No. 456,970.

Elgin, in the county of Kane and State of Ill1nois, have invented acertain new and useful Improvement in Calculating- Ma chines, of whichthe followirgis a specification, My invention relates to calculating ma-1 0 chines, and particularly to calculating attachments totypewriterssuch as illustrated in Pats. 893718 and 893719. In the attach- 1 mentthere described, there are shown a master' wheel suitably operated bythe numeral keys of the typewriter, a totalizer, the wheels whereof arerotatable by, the master wheel, a truck whercon'the totalizer is mountedand by meansof which it is carried past the master wheel to (permit themeshing of the an-arm connecting the truck to the typewriter carriageand causing the advancement of the truck by the motion of the carriage,As there shown, the truck is supported by four rollers on its backengaging the upper and lower ways of a bar which is fastened to thetypewriter framework and which also forms a part of the attachmentframework. The rollers are distributed in two couples, there being uitea distance between the two couples, an the truck extending quite adistance beyond the rollers.

In actual practice it is convenient to make the totalizer adj ustablylocatable on the truck sopas to be able to, calculate columns of figuresrintedon various portions of the rec'- ord s eet' in the typewriter, andit is also convenient to use more than one totalizer on the truck tothus calculate in a plurality of v In order to accomplish either of theabove conveniences it has been found necessary to build both the truckand the bar in true prismatic shapes, without any warp to either, sothat a totalizer will always properly mesh with the master wheel nomatter on which portion of the truck it may be located and no 'Inatteron which portion of the bar the truck may be located. Such building ofthe truck and of the bar in true prismatic shapes is a very difiicultpiece ofmechanical work,

and if not impossible it is certainly-prohibitive commercially onaccount of its expense. Moreover for the proper functioning ofthemachine, the

5 truck and barv must always retain their supporting the truck thetotalizer wheels, and

originally required accuracy and this againis not easily accomplished.For both of these reasons, it seemed highly desir -i small amount ofwarp in it, without materially afiecting the engagement of the masterand totalizer wheels, and .this I accomplish by the mechanismillustrated in the drawings of which Figure 1 is a front elevation of atypewriter, with a calculating attachment mounted thereon; Fig. 2 an endelevation thereof; Fig. 3 a section of the truck and the attachmentframework taken along the line 33 of F ig. 1, and illustrating -themanner of approximately opposite the master wheel, the drawing being toan enlarged scale; and Fig. l being a frag-' mentary front view of thecalculating attachment framework showing the rollers for supporting thetruck. Fig. 5 is a fragmentary top plan View showing the su portingrollers and truck;- and Fig. 6 is a f font elevation of the truck andsupporting rollers with the totalizer and the bottom portion of themechanism removed, to more clearly show the parts.

For the purpose of describing this invention,-it is not necessary todescribe the mechanism in detail, and for such, description reference ismade to the above cited patents. It is suflicient to point out that thenumeral keys 1 ofthe typewriter 2 are suitabl con nected to and operatethe master w eel 3 which engages and rotates the wheelsl.v of thetotalizer 5 which is mounted on the truck 6. The truck is supported bypins8 and 9. fastened into its ends, taking into slots 10 and 11 of thearms 12 and 13 fastened to the back of the typewriter carriage 7, andthe truck therefore moves with the carriage during the letter spaceadvance thereof.

Fastened to-the-framework 14 of the attachment, approximately oppositethe master wheel, are a. bottom roller 15, a lower back roller 16 and anupper roller 17, on

which roll respectively, the lower rollway 18, the lower back rollway19, and the upper rollways 20 and 21 of the truck. The truckthus has itslower portion prevented from.

moving downward, or backward, and its uper portion from moving eitherforward or ackwardfi Since the weight ofthe truck and the Weight of thetotalizer thereon tend to tip the truclrforward and downward about thebottom roller as a center, the

truck is sufliciently supported, but in order,

framework let to engage the surface 23-of the truck, and this eccentricdisk is adjusted to permit avery slight amount of freedom between thetruck and lower roller.

Should the truck be lifted, it will be. this" eccentric disk 22 and notthe upper roller 17 which will take the stress, the distance between theupper'roller 17 and the adjacent truck surface 24: being greater thanthe distance between the eccentric disk 22 and the surface 23. By theabove rollers located opposite the master wheel-that portion of thetruck which is opposite the master wheel is properly located and thatindependently of the proper location of the end of the truck or of theexact prismatic shape of the truck.-

Thus the truck need not be an exact prism but may have a long curvetherein ora gentle warp therein. As long as its cross section is properit is not necessary that it .be straight along its length, and the difli culty of the manufacture thereof is thus vastly lightened.

By the above construction, when a totalizer engages the master wheel, itis held properly in mesh therewith, because the portion of the truck atthe operating'point is sufliciently properly locate u The rollerssupporting the truck have their centers all in one plane and it is foundthat this permits the truck to pivot about the lower roller as a centerto quite an'extent before any cramping between the truck and the rollerstakes place. The general direction .of the truck therefore need not beaccurately parallel to the axis of the master wheel, nor need itsmotionbe accurately parallel thereto. This permits the supporting of thetruck at itsends by two arms, each of the arms, as beforedescribed,'preventingv its end of the truck from falling, but permittingit to rise. The arms and the bottoms of their slots are. so constructedthat the. truck has bearing on only one arm talizer pass to the otherside of the master wheel, the truck teeters over and finds a.

support on the other arm. It is-thus not necessary to have the bottomsof. the slots 1n the arms absolutely-accurately located,

only approximately 50. Moreover, in order 'to prevent any strain in thearms one of the slots 11 is inade wideenough so as'not to find anv sidebearing on the pin. 9

\Vithout limiting myself to the precise construction shown, I claim:

-1. In a calculating machine, having a -totalizer, a master wheeltherefor, a truck for said totalizer, and mechanism for rotating themaster wheel, and for advancing the truck to operate the totalizer inits various denominations: a pivotal support for said truckapproximately opposite the master wheel, and another support for the endof the truck, substantially as described.

3. In a calculating machine, having a totalizer, a master wheeltherefor, a truck for said totalizer, andmechanism for rotating themaster wheel, and for advancing the truck to operate the-totalizer inits various denominations: a pivotal support for *said' truckapproximately opposite the master wheel, and another support preventingthe end of the truck from dropping'but per mitting its rising,substantially as described.

4. In a calculating machine, having a totalizer, a master wheeltherefor, a' truck for saidtotalizer, and mechanism for rotating themaster wheel, and for advancing the truck to operate the totalizer inits varlous denominations: a pivotal support for said truckapproximately opposite the master wheel, and twoother supports for theends, of the truck, each of said other supports reventing itscooperating end of the truck 1 from dropping but permitting its rising,substantially as described.

5. In a calculating machine, having a totalizer, a master wheeltherefor, a truck for said totalizer, an arm for advancing the truck andmechanism for rotating the master.

wheel to thus operate the totalizer in its various denominations: asupport for said truck approximately opposite the master wheel and aconnection between the arm and the end of the truck whereby the armsupports the truck and also advances the same, substantially asdescribed. I

6.v In a calculating machine, having a "totalizer, a master wheeltherefor, a truck for said totalizer, an arm-for'advancing the truckand. mechanism for rotatin the master 1 wheel to thus operate the totaizer in its various denominations: a support for said truckapproximately opposite the. master wheel and a pin andslot-connectionbetween '12s the arm and the'end of the tru.ck wherebyv the arm preventsthe end of the truck from.

'7. In a calculating machine, having a totalizer, a master wheeltherefor, a truck for said totalizer, an arm for advancing the truck andmechanism for rotating the master wheel to thus operate the totalizer inits various denominations: a support for said truck approximatelyopposite the master wheel and a connection between the arm and the endof the truck, said connection consisting of a pin in one, and a slot inthe other, whereby the arm prevents the end of the truck from droppingbut permits its rising, and whereby the arm also advances the truck,substantially as described.

8. In a calculating machine, having a totalizer, a master wheeltherefor, a truck for said totalizer, and mechanism for rotating themaster wheel: two arms for supporting the ends of the truck and foradvancing it, both of said arms being operative to support the truck,but only one to advance it, substantially as described.

9. In a calculating machine, having a totalizer,amaster wheel therefor,atruck for said totalizer, and mechanism for rotating the master wheeland for advancing the truck to operate the totalizer in its variousdenominations: a roller mounted approximately opposite the master wheel,said roller serving as a support for the truck to permit itsadvancement, substantially as described.

10. In a calculating machine, having a totalizer, a master wheeltherefor, a truck for said totalizer, and mechanism for rotating themaster wheel and for advancing the truck to operate the totalizer in itsvarious denominations: a number of rollers, each mounted, approximatelyopposite the master wheel, said rollers serving as a support for thetruck to permit its advancement, substantially as described. 4

11... In a calculating machine, having a totalizer, a-master. wheeltherefor, a truck for said totalizer, and mechanism for rotating themaster wheel, and for advancing the truck thus to operate the totalizerin its various denominational sections, said truck being constantlyurged by its own weight and the weight of the totalizer-thereon to fall,a friction reducing support preventing the truck from falling and otheradjustable supports to' prevent thetruck lifted.

12. In a calculating machine, having a totalizer, a master wheeltherefor, a 'tnuck for said totalizer, and mechanism for rotating themaster wheel and for advancing the truck thus to operate the totalizer,said truck because of its weight and the weight of the totalizerthereon, constantly tending from being to fall forward and downward, aroller preventing said falling forward and a roller preventing saidfalling downward and adjustable supports to prevent the truck from beinglifted off from said rollers, substantially as described.

13. In a calculating machine, having a totalizer, a master wheeltherefor, a truck for said totalizer, and mechanism for rotating themaster wheel and for advancing the truck thus to operate the totalizer,a support for the truck approximately opposite the master wheel, saidsupport consisting of a set of rollers to prevent the truck from fallingunder the action of gravity, and other additional adjustable supports toprevent the truck from being displaced by the action of the masterwheel.

truck because of its own weight and the weight of the totalizer. thereonconstantly tending to fall forward and downward in its upper portion andforward, and backward in its lower portion, a support for said truck,said support including a roller to prevent the truck from fallingdownward, another roller to prevent' its bottom from moving backward,and another roller to prevent its top from falling forward,substantially as described.

15. In a calculating machine, having 'a totalizer, a master wheeltherefor, a truck for said totalizer, and mechanism for'rotating themaster wheel and for advancing the truck thus to operate the totalizer,.said' truck because of its own weight and the ten ing to fall forwardand downward in its upper portion and forward and backward in its lowerportion, a support for said truck, said support including a roller toprefrom falling downward, an-

vent the true other roller to prevent its bottom from moving backward,and anotherroller to prevent its top from falling forward, and otheradjustable supports to prevent the truck from being removed from therollers by the action of the master wheel, substantially as de-'scribed.-

In witness whereof, I have hereunto subscribed my name in the presenceof two witnesses.

BESTER R. WEBSTER.

Witnesses:

BURTON 0. KING, EDNA BOTKIN.

weight of the totalizer thereon constantly

